Loom-shuttle



H. H. GOVE. Loom SHUTTLE.` APPLICATION Fl'LED FEB. 23. 1918.

Patented Dec. 28,1929.,`

2 SHEETS- SHEET l- HMI Mllhh /NVE/VTUR H. H. GOVE.

LOOM SHUTTLE. APPLlcAnoNFILEn FEB. 23. 191s.

Patented Dec. 28, 1920.

2 SHEETS-SHEET 2.

ell li ifa ASSGNOE? O @NE-HALF TO HOWARD R.

W-IITEHEAE, 0F SACO, :Ll/LAINE.

Application iled February 23, 1918.

To all 'w /Lom it mcty/ concer/a Be it known thatl, Hanny ll. Goria, a citizen of the United States, residing at Biddeford, in the county oi York and Ctate of Maine, have invented certain improvements in Loom-Shuttles, ci which the tollowing description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several iigures.

This invention relates to loonrshuttles or' the type designed particularly for use in automatic weitreplenishing or ifceler looms. Looms of this type are widely used commercially and they comprise a feeler mechanism which operates when the filling on the bobbin or other weft carrier (hereinafter ierred to as a bobbin) is nearly exhausted to throw into operation a mechanism that forces a full bobbin into the shuttle, this new bobbin acting to crowd the nearly empty one out oi' the shuttle. lt is then necessary to sever the weft or iilling between the eject-ed bobbin and the goods. TJsually this wett is cut at two points, one close to the selvage and the other adjacent to the shuttle. lt is preferable, however, for many reasons to sever this weit in the shuttle. lli/hilo it has been proposed heretofore to equip shuttles with cutting mechanism designed to accomplish this object, these constructions have never proved successful commercially, so far as l have been able to learn, and accordingly it is at the present time the universal practice, so tar as l am aware, to sever the filling at points outside of the shuttle.

rlhe present invention aims to devise a simple, reliable and thoroughly practical. cutting mechanism for a loom-shuttle. The manner in which it is proposed to accomplish this object will be readily understood from the following description and the novel features will be particularly pointed out in the appended claims,

Referring now to the accompanying drawings:

Figure l is a plan view 'of a shuttle equipped with a weftV cutting mechanism embodying the present invention;

Fig. 2 is a iront elevation of the cutting` mechanism shown in F ig. l when removed from the shuttle.

F ig. 3 is a vertical, cross sectional view substantially on the line 3de?, FigQ;

Fig. 4f is a transverse cross-sectional view,

Specification of Letters Patent,

latented l'lec. 28, i926.

Serial No. 218,615.

through the shuttle box, of a loom showing the shuttle therein and showing certain parts of the wett-replenishing mechanism;

Fig. 5 is a skeleton view, partly in cross section, showing the opposite side oi' the cutting device from that shown in Fig. 2; and

Fig. 6 is a longitudinal cross sectional view through the shuttle box and certain parts adjacent thereto.

ln the drawings, 2 indicates a shuttle body provided with a longitudinal opening 3 extending therethrough from top to bottom and through which the bobbin el is inserted and ejected. r-'it one end oi the opening 3 spring jaws 5 are provided to grip the base G of the bobbin and the opposite end ot the shuttle is equipped with a threading device 7 olf the type commonly used in shutles ot this character. All of these parts are of the usual construction. l

The cutting mechanism provided by this invention is mounted in the opening 8 at a point between the tip of the bobbin and the threading device i'. rlhis mechanism comprises a plate 8 that may be set into grooves formed in the walls or" the opening 3 and secured in position by screws passing through the sides of the shuttle and entering holes 9 drilled in the opposite edge-s ot the plate. A thread guiding hole l0 is formed in the plate 8 so that it alines with the thread guiding aperture in the member 7. The

. thread cutting members per se consist of two blades ll and l2, respectively, both mounted on a headed stud 1li positioned below the thread guiding opening l0. These blades constitute a pair ol shears and they have cooperating cutting edges that straddle the path oi travel of the thread as it is unwound from the bobbin and runs through the thread guides 7 and l0. in order to prevent the stud lll from turning.` it is provided with a squared end l5 which enters a corresponding-ly shaped socket formed in the Jfront of the plate 8 and it held in this socket by a screw le.

Each of the blades l1 and lf2- consists of a bell crank lever, the blade Ill being provided with the arm 17 and blade l2 with the arm 18. A link i9 connects the arm l? with an arm 2O pinned to a rock shaft 2l that projects through the plate 8 and turns freely in bearings rigid with the plate. A similar link 22 connects the arm 18 oi the blade l2 with an arm 23 pinned to a rock shaft 24 i that projects through the plate 8 parallel to 1 swing the blades 11 Vand 12 together, thus,

i causing them to sever the thread whichtheystraddle. As-soon as the actuatingpressure onthe wings is relieved, the blades 11 and'112y are immediately opened again by springs 27 and 28,4 respectively, the spring 27 being connectedat its upper end to a lug on the plate 8 and at its lower end to a lugprojecting,v from the link 22, and' the other spring 28 heilig correspondingly connected tothe linie 19. The/range of movement of these blades under lthe influeneeof the springs 217 and 28- is limited `by stops 291and 30,-arrangedV to engage shoulders formed,l respectively, onthe'linlrs22 and 19.'-

lieferringnow to holder or hopper 35 into the shuttlelocated. in box 32. his above stated,- the act of forcing the full? bobbin into the proper position Figo shows thel shears at the instant thatV the-bobbin tip l-is--aboutlto pass down out of engagementwithY the wings and in the'v positions that theyv occupy just after completing the cutting operation'.A

This mechanism, therefore, cutsth'e filling thread closeto the bobbin:V so that asV thesubij stantiallyA empty bobbinis ejected, the thread` end that trails Vbehind it is so-short that there isabsolutely no danger of its'catching.`

in any part of the shuttle. This bobbin, therefore, drops freelyv out'V of the machine carryingthetrailing end of the fillingr thread` with it; As soon as the tip of the fullbobbi-ir has passed" below the wings 25 and 2o'the springs 27 .and28 will return the ejected bobbin, an'import'ant' feature of this invention is the arrangement whereby they are operatedV by the incoming. bobbin. It

willf be seen from an inspection ofi'Fi'gi 6"v that whenthe hammer 33 and forlrBB move downwardly to forceV the full'bobbin 34 into Y Vthe wings of the cuttingmechanism. Figs. 1 and 6,it will'bel y seen that the shuttle2fis there shown inthe.y shuttlebox 32 and that the hammerBS and" forlr' of the bobbin'fchanging mechanism is about to force anew bobbinii from the blades 11'` and. 12 to their open positions. Vldlhile the shears ymight be operatedfby the outgoingor the shuttle, thus displacing the empty bobbin 4L, the base 6 of the empty bobbin may be forced out of therjaws 5 so quickly that the tip of thisbobbin will not be pushed against the wings with suflicient force to insure the proper operation of the shears. T his is particularly likely to happen if the new bobbinhap'pens to be a short one, that is, is only partially filled. The base of the bobbin, be-

ingy larger than the tip, is engaged by the base of the incoming bobbin before the filling on the incoming bobbin engages the bobbin spindle. Consequently,the baseis Ishot out of the shuttle withV considerable force and its tip swings toward thebase and either moves entirely* clear ofthe wings, or engages them'so'lightlythat itdoes not operate them. Any danger of failure due to this cause is'eliminat'ed by theconstruction' herein shown and described, since the'transfe'rrer that forcesthe full bobbin intoithe shuttle positively moves the tip as well as the base of the bobbin. Th'ereis; therefore, nol op,- portunity'for the tipl of the bobbin to doldge t is impossible'for the transferring operation to be completed withoutiactuating thecuttingi mechanism. Thismechanism might also be operated by some'part of the transferrer, but I prefer the arrangement shown, particularly' since the movement transmitted by the transferrer tothe incoming bobbin is sub-` stantially as Vpositive as is the movement of the transferrer' itself.

The converging construction of the wings and? thev fact Vthat they are inclined toward each other, as Vshown ,in Figs. 3 and 4,' tends to center the bobbinl tipjbetween them and insurcthe operationy of both the blades 11" and 12. As a further provision for insuring the' complete cutting lof the filling` thread l have mounted the blades 11 and`12 on ythe stud 1% so that they can not only' pivoton this stud, but can also have a relative sliding move ment ilon'gitudinallyl of the stud and 1 have sprungor inclined'the' points of the blades V laterallytowardeachother. A spriiig f36, Fig. 3:,presses the blade 11 toward the blade 12 so'that asthe 'blades l11' and 12 are closed to perform their cutting operation, their cut ting' edges are constantly pressed together at theirpoint `of intersection as this point travels 'outwardly along the edges of the blades toward their tips. This construction insures the complete severance of the thread at each cuttingl operation, evenV after the parts'have become considerably worn and itl tends to prevent the wearvof the bladesyfron'i dulling them. These features thus con-v tribute to the'li'fe and the reliability of the long period without attention or repair. .fin advantage of the wings 25 and 26, in addition to that above mentioned, is that they facilitate the shuttle threading operation and that their" peculiar shape makes it impossible for the thread to catchon them as it balloons oit the end of the bobbin tip during the weaving operation.

Nhat is claimed as new is:

1. it shuttle for weft replenishing looms, said shuttle being provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection of said bobbin, shears comprising two movable blades mounted in said shuttle in position to straddle the thread as it is unwound from said bobbin and travels through said thread guiding means, and actuating means for said shears arranged to be operated by the engagement therewith of a bobbin during the bobbin changing operation.

2. A shuttle for weft replenishing looms, said shuttle being provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection of said bobbin, cooperating movable cutters mounted in said shuttle in position to out the thread adjacent to said thread guiding means, and actuating devices for said cutters arranged to be operated by the contact therewith of an incoming bobbin.

3. A shuttle for weit replenishing looms, said shuttle having an opening therethrough to receive a bobbin and to permit the ejection therefrom of said bobbin, outting members mounted in said shuttle for relative movement to enable them to sever the filling thread, and movable devices for operating said members mounted in. the path of movement of the tip of the bobbin during the bobbin changing operation and exerting a centering action on the bobbin tip.

et. A loom-shuttle provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection of said bobbin, shearing members mounted in said shuttle :tor relative movement to sever the thread at a point adjacent to said thread guiding means, means act-ing on said members to hold them constantly in shearing engagement as the point ot shearing action travels along them during their relative movement, and actuating means for said members arranged to be engaged by the tip of an incoming bobbin and to be operated thereby.

5. .fr loom-shuttle provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection of said bobbin, a pair of shears comprising two pivoted blades between which the thread passes in traveling through said guiding means, a stud on which said blades are pivoted and on which they are mounted for relative movement toward and from each other, said blades being inclined toward each other,V a spring operative to press said blades together to hold the edges oi the blades in shearing Contact as the point of shearing action travels outwardly along .said edges during the cutting movement of the blades,v actuating means for said blades arranged to be operated by the engagement therewith of a bobbin during the bobbin changing operation and spring means connected with said blades to hold them normally open.

6. A thread cutting device for a loomshuttle comprising a plate provided with a thread receiving opening, a stud mounted adjacent to said opening, a pair of blades pivotally mounted on said stud and constituting shears, spring means operative normally to hold said shears open, arms pivoted in said plate and arranged to be turned on their axes by the passage of a bobbin between them, and connections between said arms and blades for causing the movement oit the arms to close the shears.

7. A thread cutting device i'or a loomshuttle, comprising a plate provided with an opening for the passage therethrough or' a bobbin thread, a stud mounted adjacent to said opening, a pair or" blades pvotally mounted on said stud and constituting shears, spring means operative normally to hold said shears open, a pair of arms pivoted on said plate and arranged to be turned on their axes by the engagement therewith of a portion of the bobbin, and links connecting said arms and said blades whereby the movement of the arms operates the shears.

8. shuttle for weft replenishing looms, said shuttle being provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection or" said bobbin, thread cutting means mounted in said shuttle in position to sever the bobbin thread adjacent to said thread guiding means, and actuating devices for said thread cutting means mounted in the path of movement of the tip of the bobbin during the bobbin changing operation and serving to guide the thread toward said thread guiding means.

9. A shuttle for weit replenishing looms, said shuttle being provided with thread guiding means and having an opening therethrough to receive a bobbin and to permit the ejection of said bobbin, thread cutting means mounted in said shuttle in position to sever the bobbin thread adjacent to said thread guiding means, and actuating devices for said thread cutting means mounted in the path of movement of the tip oi the bobbin during the bobbin changing operation and including wings Y thread svrinfg means;

each other.

NIW GOV'E. 

